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Water-base paint specially for disappearing cast mold

A technology of lost foam casting and coating, applied in casting molding equipment, coating, mold and other directions, can solve the problems of unguaranteed product quality, poor paint permeability, poor paintability, etc., and achieve good energy change characteristics , Good fluidity and good air permeability

Inactive Publication Date: 2002-10-23
黄述哲 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lost foam casting is a casting process in which plastic foam beads are used to make a model, poured under negative pressure, and the molten iron replaces the position of the model to cool and form it. Since the foam model is easily deformed during the molding process and its strength is not enough, it is usually coated with a coating on the outer surface of the model. The strength and rigidity can be improved by using a layer of paint, so that the combustion products and gases of the model can pass through the paint layer and be discharged into the molding sand under the action of negative pressure. The currently used paint has poor air permeability, rigidity, and brushability. Therefore, product quality cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take high alumina bauxite, particle size is 150 mesh, 700kg, diatomite particle size is 230 mesh, 300kg, bentonite 20kg, industrial sodium carbonate 2kg, cellulose sodium 5kg, white latex 40kg, aluminum sulfate 10kg, iron oxide 30kg, starch 20kg, washing powder 0.1kg and water 700kg, the above raw materials and water are mixed, ground and stirred to form the product.

Embodiment 2

[0024] Take high alumina bauxite, particle size is 180 mesh, 800kg, diatomite particle size is 180 mesh, 250kg, bentonite 25kg, industrial sodium carbonate 1kg, cellulose sodium 10kg, white latex 35kg, aluminum sulfate 15kg, iron oxide 25kg, starch 25kg, washing powder 0.15kg and water 750kg, the above raw materials and water are mixed, ground and stirred to form the product.

Embodiment 3

[0026] Get high alumina bauxite, particle size is 270 mesh, 850kg, diatomite particle size 180 mesh, 200kg, bentonite 30kg, industrial sodium carbonate 0.5kg, cellulose sodium 15kg, white latex 30kg, aluminum sulfate 20kg, iron oxide 20kg, 30kg of starch, 0.2kg of washing powder and 800kg of water are mixed, ground and stirred to form the product.

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Abstract

The water-base dissolving mould casting special-purpose coating is formed from 700-850 portions of alumina, 150-300 portions of diatomaceous earth, 20-30 portions of bentonite, 0.5-2.,0 portions of industrial sodium carbonate, 5-15 portions of cellulose sodium, 30-40 portions of white emulsion, 10-20 portions of aluminium sulfate, 20-30 portions of iron oxide, 20-30 portions of starch, 0.1-0.2 portion of washing powder and 700-800 portions of water. Said coating possesses good imbibition property, good transmutation and flowability, uniform coating layer, high strength and other advantages.

Description

(1) Technical field [0001] The invention relates to a special coating for water-based lost foam casting, which belongs to chemical products. (2) Background technology [0002] Lost foam casting is a casting process in which plastic foam beads are used to make a model, poured under negative pressure, and the molten iron replaces the position of the model to cool and form it. Because the foam model is easily deformed during the molding process and the strength is not enough, it is usually painted on the outer surface of the model. The strength and rigidity can be improved by using a layer of paint, so that the combustion products and gases of the model can pass through the paint layer and be discharged into the molding sand under the action of negative pressure. The currently used paint has poor air permeability, rigidity, and brushability. Therefore product quality cannot be guaranteed. (3) Contents of the invention [0003] The purpose of the present invention is to overc...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 黄述哲刘涛黄卉
Owner 黄述哲
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